Claire Danes at SAG Awards 2013: My Son Cyrus Is "Getting Fat"

Hot mama in the house! Claire Danes continued her show-stopping awards show appearances at the Screen Actors Guild Awards on Sunday, Jan. 27.

The new mom, who gave birth to Cyrus Michael Christopher just over a month ago, on Dec. 17, flaunted her post-baby body in a black one-shouldered Givenchy gown that accented her slim figure. The Homeland actress capped off her look with a dark lip color and a loose ponytail.

But even though Danes had the chance to escape mommy duty for the evening, she couldn't help gushing about her little bundle of joy.

"He's getting fat. It's very exciting," she told E! News' Giuliana Rancic on the red carpet. "All the time on the boob is starting to result in growth. He's getting rolls. He's starting to smile. He kind of knows that I exist. That's reassuring!"

During her acceptance speech at the Golden Globes earlier this month, the 33-year-old actress thanked her cast and crew for being so accommodating on-set, especially wardrobe, who "had to pull out my pants every single day."

She also gave a nod to husband Hugh Dancy, 37, and her parents, who were babysitting Cyrus upstairs through the night. Motherhood, she later told reporters in the Globes press room, has been one big marathon of no sleep.

"I get some sleep, but I just think, like, 'Okay, it's another 4 a.m. call, which I have a lot on set, working in film and television,'" she said of adjusting to an odd sleep schedule. "So I'm sort of used to being sleep-deprived. But this is taking it to another level, and there isn't a weekend off. There's no break!